package com.lagou.config;

import com.lagou.pojo.Configuration;
import com.lagou.pojo.MappedStatement;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;


import java.io.InputStream;
import java.util.List;

public class XMLMapperBuilder {
    private Configuration configuration;
    public XMLMapperBuilder(Configuration configuration) {
        this.configuration=configuration;
    }
    public void  parse(InputStream inputStream) throws DocumentException {
        Document document = new SAXReader().read(inputStream);
        Element rootElement = document.getRootElement();

        String namespace=rootElement.attributeValue("namespace");

        List<Element> list=rootElement.selectNodes("//select");
        list.addAll(rootElement.selectNodes("//insert"));
        list.addAll(rootElement.selectNodes("//update"));
        list.addAll(rootElement.selectNodes("//delete"));
        for (Element element : list) {
            String id=element.attributeValue("id");
            String resultType=element.attributeValue("resultType");
            String paramterType=element.attributeValue("paramterType");
            String sqlText = element.getTextTrim();
            MappedStatement mappedStatement=new MappedStatement();
            mappedStatement.setId(id);
            mappedStatement.setSql(sqlText);
            mappedStatement.setParamterType(paramterType);
            mappedStatement.setResultType(resultType);
            String key=namespace+"."+id;
            configuration.getMappedStatementMap().put(key,mappedStatement);
        }
    }
}
